I purchased this for a plane trip with our toddler who is almost 4. I found it very easy to use, undo for security and quickly refasten. My toddler decided to sit in her carseat while we were standing in lines that were barely moving, and it was strong enough for us to scoot along in the line, however I would not recommend using it to transport a child in the terminal, as the roller bag you attach it to is likely not designed to support the weight of a full bag plus toddler. As I was putting it away this morning, my husband commented that it seems like something that could have tons of useful applications beyond its intended purpose.